One for sorrow, two for joy - what about 25?

Preparing to roost today were twenty five magpies. This must constitute by far the greatest congregation of this species I have ever seen. There has been a large family group of around twelve individuals roosting in the trees beyond the garden of late, but today, two or more groups must have conjoined to produce this amazing flock. Their chattering was cacophonous and the sight of so many pied birds together was quite spectacular.